site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com The places this doesn't hold true are: (1) Some place along the path, you've firewalled off ARP packets, OR -Joe _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... (2) You have a Cisco PiiX firewall or other stateful firewall that tracks connection state, and has a connection timeout in order to prevent a DOS attack via connection table overflow over time (in which case, it's configurable, but you are likely either failing to configure it, or you don't have rights to configure it). You'll also see this type of behavior in any other kind of firewall that performs it's function by NAT'ing your inside IP address to an external IP address. The translation table typically has an idle timeout and will delete your NAT session after a period of inactivity. The firewalls will sometimes send RST's in both directions indicating that the connection is being closed abortively. This email sent to site_archiver@lists.apple.com